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Homomorphic partial differential equation filtering method for electronic speckle pattern interferometry fringes based on fringe density 被引量:6

Homomorphic partial differential equation filtering method for electronic speckle pattern interferometry fringes based on fringe density
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摘要 Noise reduction is one of the most exciting problems in electronic speckle pattern interferometry. We present a homomorphic partial differential equation filtering method for interferometry fringe patterns. The diffusion speed of the equation is determined based on the fringe density. We test the new method on the computer-simulated fringe pattern and experimentally obtain the fringe pattern, and evaluate its filtering performance. The qualitative and quantitative analysis shows that this technique can filter off the additive and multiplicative noise of the fringe patterns effectively, and avoid blurring high-density fringe. It is more capable of improving the quality of fringe patterns than the classical filtering methods. Noise reduction is one of the most exciting problems in electronic speckle pattern interferometry. We present a homomorphic partial differential equation filtering method for interferometry fringe patterns. The diffusion speed of the equation is determined based on the fringe density. We test the new method on the computer-simulated fringe pattern and experimentally obtain the fringe pattern, and evaluate its filtering performance. The qualitative and quantitative analysis shows that this technique can filter off the additive and multiplicative noise of the fringe patterns effectively, and avoid blurring high-density fringe. It is more capable of improving the quality of fringe patterns than the classical filtering methods.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第3期210-213,共4页 中国光学快报(英文版)
关键词 Computational fluid dynamics Image quality INTERFEROMETERS Interferometry Moire fringes Partial differential equations SPECKLE Computational fluid dynamics Image quality Interferometers Interferometry Moire fringes Partial differential equations Speckle
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  • 2李东晖,郭立.Kalman filtering techniques for reducing variance of digital speckle displacement measurement noise[J].Chinese Optics Letters,2006,4(8):453-456. 被引量:2
  • 3邱天,郭立,李东晖,朱俊株,白雪飞.数字散斑的边缘相关测量法[J].中国激光,2006,33(8):1092-1096. 被引量:7
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  • 5TANG Chen, ZHANG Fang, CHEN Zhan-qing. Contrast Enhancement for Electronic Speckle Pattern Interferometry Fringes by The Differential Equation Enhancement Method [J]. Applied Opties(S1559-128X), 2006, 45(10): 2287-2294.
  • 6LI Can-can, TANG Chen, YAN Hai-qing, et aL Localized Fourier Transform Filter for Noise Removal in Electronic Speckle Pattern Interferometry Wrapped Phase Patterns [J]. Applied Opties(S1559-128X), 2011, 50(24): 4903-4911.
  • 7David I Farrant, Guillermo H Kaufmarm, Jon N Petzing, et aL Measurement of Transient Deformations With Dual-Pulse Addition Electronic Speckle-Pattern Interferometry [J]. Applied Optics(S 1559-128X), 1998, 37(31): 7259-7267.
  • 8Pablo D Ruiz, Jonathan M Huntley, Ricky D Wildman. Depth-resolved Whole-field Displacement Measurement by Wavelength-scanning Electronic Speckle Pattern Interferometry [J]. Applied Opties(S 1559-128X), 2005, 44(19): 3945-3953.
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